398results about How to "Increase conversion rate per pass" patented technology

The invention provides a crude oil catalytic cracking low carbon olefin and aromatic hydrocarbon preparing method. The crude oil catalytic cracking low carbon olefin and aromatic hydrocarbon preparingmethod is characterized by comprising the following steps of 1), desalinating and dewatering crude oil, then heating the crude oil in a heating furnace, and then dividing the heated crude oil into heavy components and light components in a distillation tower at a cut point of 150-300 DEG C; 2) subjecting the light components discharged from the top of the distillation tower, namely a fed light material, and the heavy components discharged from the bottom of the distillation tower, namely a fed heavy material, to contact reaction with high-temperature catalysts under a vapor atmosphere in tworeactors separately. Compared with the prior art, the crude oil catalytic cracking low carbon olefin and aromatic hydrocarbon preparing method has the advantages of 1) high raw material adaptability,2) high metal contamination resistance of the catalysts, no hydrothermal deactivation and low reagent consumption, 3) lower energy consumption compared with steam cracking, and 4) high per-pass conversion rate and high olefin selectivity.

A process for preparing cyclohexanol, cyclohexanone and adipic acid by catalytic oxidization of cyclohexane under existance of metallic porphyrin catalyst and a certain temp and pressure through combination of different reactors is disclosed. Its advantages are high single-pass conversion rate of cyclohexane and total output rate, low energy consumption and cost, and no need of cyclohexanol or acetone solvent and cocatalyst.

The invention relates to a process for indirectly producing alcohol with synthetic gas. The process comprises the steps that the synthetic gas formed by mixing industrial carbon monoxide with hydrogen is taken as a raw material to synthesize methanol; methanol is dehydrated to prepare dimethyl ether; dimethyl ether, carbon monoxide and hydrogen are mixed for carbonylation reaction to prepare methyl acetate; methyl acetate is purified and hydrogenated; a hydrogenated product is purified; and an alcohol product is obtained. An adopted catalyst, the process and a device have the characteristics of high conversion per pass and high effective utilization rate of reaction heat; the load of separating a crude product is reduced greatly; the production flow is shortened; and the production energy consumption is reduced greatly.

The invention relates to a catalyst of a 1, 2-propanediol prepared by hydrogenolysis of glycerine. The catalyst is a compound oxide, and contains cuprocide (weight fraction) 25 percent to 60 percent, zinc oxide 35 percent to 70 percent, aluminum oxide (weight fraction) 0 percent to 10 percent and at least one or a plurality of rare-earth oxides 0.5 percent to 10 percent of rare earth elements, such as Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, etc. The catalyst is used in continuous hydrogenolysis reaction of glycerine, in which the conversion rate of the glycerine is high, the selectivity of the 1, 2-propanediol is high and the activity of the catalyst is very stable. The invention also provides the preparation method of the catalyst and application of the catalyst in preparation of 1, 2-propanediol by hydrogenolysis reaction of glycerine.

The invention relates to a method for producing oxalic ester by CO gaseous phase coupling, which mainly solves the problems of low selectivity of target products and low single-pass conversion in the prior art. The method adopts a technical proposal that raw materials of nitrous acid ester-containing gas and CO are introduced into a reacting-separating tower and are contacted with palladium-containing catalysts under the condition that the temperature is between 60 and 160 DEG C, the reaction contact time is between 0.5 and 6 seconds, and the reaction pressure is between 0.05 and 1.5 MPa, a gas-liquid mixture containing oxalic ester is generated after the reaction; meanwhile, gas-liquid separation is performed in the reacting-separating tower, an oxalic ester product is obtained at the bottom of the tower, and gaseous phase effluenst containing unreacted nitrous acid ester and CO are obtained at the top of the tower. The method solves the problems well and can be used in industrial production for increasing the yield of the oxalic ester.

The invention relates to a catalyst used for direct preparation of light olefin from synthetic gas, a preparation method and an application thereof. According to the invention, a parallel flow precipitation method is used to highly disperse Fe and auxiliary agents on surfaces of self-made alkaline carriers, and thus a catalyst load is low, a preparing technology is simple and a cost is lower than that of product with a same type. When the catalyst is used for direct preparation of the light olefin from the synthetic gas, a CO conversion rate can reach 75-85 % under a one-way catalytic condition of the synthetic gas, an alkene-alkane ratio can reach 4.5-6.0 in organic gas products, an alkene weight is 50-60 % and more than 98% of the liquid product is water. The catalyst is good in abrasion resistance and pressure resistance, and can be used for slurry beds and fixed beds. A reaction technology of the catalyst is that the temperature is 200-500 DEG C, a pressure is 0-5 MPa, and an air speed of the synthetic gas is 600-2400 <-1>.

The invention relates to a process for producing dimethyl carbonate from industrial synthetic gas. According to the invention, O2, CO, N2, NO, and methanol are delivered into an esterification system for esterification; heavy component drawn from the esterification system is subjected to recovery treatment in a wastewater tower; light component drawn from the esterification system passes a compressor II and is subjected to a carbonylation reaction in a carbonylation reactor; the carbonylation reaction product is delivered into a second condensation separation tower, and is subjected to gas-liquid separation; separated liquid phase is refined in a pressurized rectification tower; part of non condensable gas is discharged from the separated gas phase, and the gas phase is continued to be subjected to a reaction in the esterification system; the discharged non-condensable gas is delivered into a denitration reactor; light component at a top of the pressurized rectification tower is subjected to further recovery treatment in a methanol recovery tower; heavy component from the pressurized rectification tower is delivered into a product tower; dimethyl carbonate is drawn from the top of the product tower, and dimethyl oxalate is drawn from the bottom of the product tower. The process has the economical and practical characteristics of low equipment investment, environment friendliness, energy saving, high catalyst efficiency, high raw material utilization rate, and the like.

The invention discloses an environment-friendly preparation method of tert-butylamine. Isobutylene and liquid ammonia are directly subjected to amination under the action of a catalyst to prepare the tert-butylamine. The catalyst uses a Y-type zeolite molecular sieve as the matrix, and the active component elements and modifying elements account for 10-30%. The Y-type zeolite molecular sieve is modified by the following steps: exchanging the Y-type zeolite molecular sieves with an NH4Cl aqueous solution, washing, drying in a nitrogen or argon atmosphere, and carrying out heat treatment by roasting to obtain an H-type zeolite molecular sieve; and carrying out dipping treatment on the H-type molecular sieve with metal salt, drying in a nitrogen or argon atmosphere, roasting to obtain the modified Y-type zeolite molecular sieve. The modified Y-type zeolite molecular sieve catalyst must be activated before use. The invention has the advantages of mild reaction conditions, high selectivity, high yield, environment friendliness and low catalyst modifying cost, and is suitable for industrial production.

The invention provides a method for preparing low-carbon olefin and arene by catalytic cracking of raw oil. The method is characterized by comprising the following steps: 1) after desalting and dewatering, the raw oil enters a heating furnace for heating, then enters a distilling tower to be divided into light components and heavy components, and the cutting point is between 150 DEG C and 300 DEGC; 2) the light components coming from the tower top and the heavy components coming from the tower bottom carry out reaction at different reaction zones of a same reactor; the light components, namely lightweight fed materials, are firstly contacted and react with a high-temperature regeneration catalyst, and then the heavy components, namely heavyweight fed materials are contacted and react withthe catalyst. Compared with the prior art, the method for preparing the low-carbon olefin and arene by catalytic cracking of the raw oil, provided by the invention, has the following advantages: 1) the adaptability of the raw materials is strong; 2) the metal-pollution resistance of the catalyst is strong, and hydrothermal deactivation can not occur, so that the preparation consumption is low; 3)compared with steam cracking, the energy consumption is low; 4) the single-pass conversion ratio is high and the olefin selectivity is high.

The invention discloses a device and a method for reducing the temperature of catalytic cracking regenerated catalyst in the field of petrochemical industry catalytic cracking and aims to solve the problems that the method for reducing the temperature of catalytic cracking regenerated catalyst has a small application range in the prior art, and the like. The device comprises a regenerated catalyst cooler (4) arranged below a regenerator (1) and the bottom head of the cooler is internally provided with a cooling main air distributor (8). A sleeve (5) is arranged between the top of a taper section of the regenerated catalyst cooler and the bottom of the regenerator and provided with a regenerated catalyst conveying pipe (3) internally, and an annular space (6) is formed between the sleeve and the conveying pipe. A regenerated inclined pipe (11) is arranged between the regenerated catalyst cooler and a heavy oil riser reactor (12) of a catalytic cracking device. The invention also discloses a method for reducing the temperature of catalytic cracking regenerated catalyst by adopting the device. The device and the method can be used for setting a catalytic cracking device of a single heavy oil riser reactor and a plurality of riser reactors.

A process for synthesizing ethoxy quinoline from p-aminobenzoether and acetone features that in the synthesizing reaction, the super-strong solid acid H2SO4-MoO3-TiO2 is used as its catalyst for high reaction speed and high transform rate.

The invention relates to a method for preparing a catalyst, which is used in making low-carbon mixed alcohol carbon nanometer tube promoting Co-Cu group. The catalyst comprises Co, Cu and carbon nanometer tube, wherein the mass percent is: Co:40-75wt%,Cu:15-50wt%,CNTs:5-25wt%, the CNTs is a multi-wall carbon nanometer tube. The catalyst is prepared through coprecipitation, which has high activity and stability, and the C2+ alcohol has high selective, besides, both the conversion rate of CO and space time productivity of the low-carbon mixed alcohol are higher than the present catalyst.

The invention relates to a method for synthesizing trioxymethylene by methanol through condensation, oxidation and polycondensation. According to the invention, methanol and dilute formaldehyde with concentration of 5-30% separated from a trioxymethylene apparatus are taken as raw materials to synthesize methylal with concentration of 85-99.9%; methylal and air are subjected to catalyst oxidation to generate formaldehyde through an iron molybdenum method, through refining water and methylal unit tower waste water absorption, a formaldehyde aqueous solution with concentration of 70% is generated; high-concentration formaldehyde is introduced into a trioxymethylene synthetic tower, and the trioxymethylene is synthesized under existence of a strong-acid cation exchange resin catalyst, and trioxymethylene with content of 99.9% can be obtained through steps of rectification and concentration, extraction, rectification, and purifying. The method solves the problems of low conversion rate, selectivity and low yield during a trioxymethylene production process, solves the problems of low catalyst reaction efficiency and corrosivity, and solves the problems of complex technology and high energy consumption. The method provides good raw materials for producing PODE, and realization of industrialization of PODE can solve the problem of excess production capacity of methanol in our country.

The invention discloses an energy-efficient super-large scale methanol-synthesizing method with production of steam of different grades. Virgin gas is compressed and mixed with circulation gas for forming a gas mixture, the gas mixture is heated and simultaneously enters two parallelly arranged first methanol reactors for carrying out methanol synthesis reactions, and incompletely reacted synthetic gas and a methanol steam mixture are formed; the incompletely reacted synthetic gas and the methanol steam mixture are cooled and enter a second methanol reactor for carrying out a methanol synthesis reaction to obtain a final product; the final product is cooled and separated, and parts of the separated gas is used as circulation gas; and liquid crude methanol enters a downstream rectification unit. The invention also discloses an apparatus for realizing the method. A reasonably configured heat exchanger network is used for improving conversion per pass and concentration of methanol at the outlet of the reactor maximally, and reducing recycle ratio and energy consumption, and producing steam of different grades; the low pressure steam can meet low pressure steam demands of the downstream methanol rectification unit.

The single tower ethyl acetate preparing process includes boiling the mixed liquid in certain acid/alcohol ratio and with strong acid catalyst and water carrying agent inside tower; opening condensating water for full reflux operation and stable top temperature after the vapor reaches to tower top; regulating acid/alcohol ratio to 1 and feeding strong acid catalyst from the top; regulating certain reflux ratio with the reflux ratio regulator, taking coarse ester product from the top and maintaining the top temperature unchanged; discharging gas material from the bottom, condensating in condensator, separating water in phase separator and refluxing organic phase with rich water carrying agent to the tower. The present invention has ester content in coarse ester product over 94 %, high conversion rate, low power consumption and low production cost.

The invention discloses a catalyst for preparing light aromatic hydrocarbon by synthetic gas one-step process, and a preparation method and an application thereof. The catalyst comprises a Fischer-Tropsch synthesis catalyst and an aromatization catalyst, wherein the Fischer-Tropsch synthesis catalyst includes an oxide of Fe and an oxide of Mn, and a composite metal oxide can fully improve the high-temperature Fischer-Tropsch synthesis activity; the aromatization catalyst is a modified molecular sieve with HZSM-5 as a carrier and with Mo and Ni double metals as active components, and the aromatization performance can be significantly improved. Through the combination of the two catalysts, series coupling of a Fischer-Tropsch synthesis reaction and an aromatization reaction is achieved, a one-way conversion rate of CO is increased obviously, and at the same time, a technology route for preparing light aromatic hydrocarbon-benzene, toluene and xylene (BTX) by synthetic gas one-step process is exploited. Experiments verify that the conversion rate of CO reaches up to 98% or more, the selectivity of hydrocarbonyl of aromatic hydrocarbon reaches 73% or more, and the selectivity of hydrocarbyl of BTX reaches 53%. The catalyst for preparing aromatic hydrocarbon by the synthetic gas one-step process has the advantages of relatively good catalytic activity, good stability and simple preparation, and has relatively good industrial application prospects.

The process of preparing symmetric tetrachloro pyridine includes the chlorination reaction of chloro pyridine containing 1-3 chlorine atoms and chlorine at 170-250 deg.c in the presence of iron powder or Lewis acid as catalyst for 8-48 hr. The preparation process uses chlorine in the liquid phase chlorination reaction to chlorinate chloropyridine, dichloropyridine, trichloropyridine, etc, and has single pass conversion rate up to 97 %, simple technological process, low production cost and excellent industrial application value.

The invention relates to a method for continuously preparing ethylene by using ethane. The method comprises the following steps: firstly, enabling ethane to react with NiCl2 to obtain C2H4 and HCl mixed gas; reducing solid NiCl2 into Ni; absorbing HCl from the C2H4 and HCl mixed gas by using a circulating NiCl2 solution; precipitating, crystalizing and separating the NiCl2 solution in which HCl is absorbed to obtain solid NiCl2 and a hydrochloric acid solution; drying the obtained solid NiCl2 and recycling; absorbing C2H4 gas from which HCl gas is removed, and performing rectification separation to obtain a C2H4 product; enabling the hydrochloric acid solution to react with Ni generated in the previous reaction to obtain H2 and a NiCl2 solution; recycling the obtained NiCl2 solution. During the process of the method, Ni is taken as an intermediate medium for circular reaction, and the method has the characteristics of low energy consumption, high yield, and use of recyclable medium nickel and capability of producing a byproduct H2 energy.

The invention discloses a catalyst for preparing vinyl acetylene and an application method thereof; the components of the catalyst include cuprous chloride, water, organic solvent, organic amine salt and organic ionic liquid. The application method includes steps that: under deoxygenation condition, the organic amine salt is dissolved in the solution of the organic solvent; and then cuprous chloride and organic ionic liquid are added to the solution; acetylene gas is introduced while the temperature is maintained constantly to produce vinyl acetylene. The invention improves the performance of an acetylene dimerization catalytic system, also increases the conversion per pass of acetylene and vinyl acetylene selectivity, produces less byproduct during reaction, greatly reduces the content of acetylene high polymer and accordingly reduces the separation difficulty and the production cost.